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Mapping and Functional Characterization of HOX Gene Expression Patterns in Human Normal Tissue and Solid Tumors
Mapping and Functional Characterization of HOX Gene Expression Patterns in Human Normal Ti...
Mapping and Functional Characterization of HOX Gene Expression Patterns in Human Normal Tissue and Solid Tumors

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211151035
ISBN  
9798383565940
DDC  
575
저자명  
Kurbatov, Vadim.
서명/저자  
Mapping and Functional Characterization of HOX Gene Expression Patterns in Human Normal Tissue and Solid Tumors
발행사항  
[Sl] : Yale University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
117 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
주기사항  
Advisor: Lu, Jun.
학위논문주기  
Thesis (Ph.D.)--Yale University, 2024.
초록/해제  
요약HOX genes, fundamental in directing embryonic development, are implicated in the spatial organization of tissues. Their influence, traditionally investigated during early developmental stages, has been noted in a wide variety of malignant processes, albeit at a single gene level in the context of individual cancer types. Given that the HOX genes represent a complex and interrelated network, a unified model evaluating the role of the entire set of HOX genes in cancer has not yet been achieved. Similarly, an overarching model that considers HOX gene patterns in multiple cancer types is absent.This study aims to discover the pattern of HOX gene expression in human adult tissues and cancer, and to evaluate their function in vitro. To systematically investigate the expression of HOX genes across a broad spectrum of human adult tissues and to assess their involvement in the cancer biology, we sought to map the landscape of HOX gene expression, exploring how these developmental genes are repurposed. Performing computational analyses of gene expression data from the GTEx and TCGA datasets, along with targeted CRISPR-Cas9 and CRISPR activation (CRISPRa) screens, we sought to understand the functional implications of HOX gene expression.Our study unveiled distinctive HOX gene expression patterns across human adult tissues, confirming their continued role beyond embryonic development. Notably, a pattern emerged showing many cancers exhibiting a shift towards HOX expression profiles characteristic of normal posterior body tissues, a phenomenon we refer to as posteriorization. We found posteriorization to be associated with higher tumor grade and worse survival outcomes across a spectrum of cancer types.Experimentally, the functional significance of HOX genes in cancer was further explored using CRISPR-Cas9 loss-of-function (LOF) and CRISPRa gain-of-function (GOF) screens. These screens targeted specific HOX genes to assess their impact on cell viability in several cancer cell lines. The LOF screen demonstrated cell-line-specific responses to HOX paralog group disruption, providing evidence of both suppressive and advantageous effects on cancer cell viability. Additionally, the GOF screen provided insights into how overexpression of certain HOX genes can suppress cancer cell growth, depending on the cellular context. These findings show that the roles of HOX genes in cancer is context-dependent and can vary between different tumor types.Our investigation focuses on the expression patterns of HOX genes in adult human tissues and their reprogramming in cancer. The discovery of posteriorization across various solid tumors demonstrates the impact of developmental gene expression patterns on cancer biology. Furthermore, our experimental findings highlight the importance of context in the regulation and effects of HOX genes in malignancy. By advancing our understanding of cancer through the lens of developmental biology, our work paves the way for potentially novel approaches to cancer diagnosis and treatment that exploit the dysregulation of HOX genes.
일반주제명  
Genetics
일반주제명  
Medicine
일반주제명  
Cellular biology
일반주제명  
Oncology
일반주제명  
Developmental biology
키워드  
Cancer
키워드  
HOX genes
키워드  
Gene expression
키워드  
Human adult tissues
키워드  
Posteriorization
기타저자  
Yale University Investigative Medicine
기본자료저록  
Dissertations Abstracts International. 86-02B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aKurbatov,  Vadim.
■24510▼aMapping  and  Functional  Characterization  of  HOX  Gene  Expression  Patterns  in  Human  Normal  Tissue  and  Solid  Tumors
■260    ▼a[Sl]▼bYale  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a117  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-02,  Section:  B.
■500    ▼aAdvisor:  Lu,  Jun.
■5021  ▼aThesis  (Ph.D.)--Yale  University,  2024.
■520    ▼aHOX  genes,  fundamental  in  directing  embryonic  development,  are  implicated  in  the  spatial  organization  of  tissues.  Their  influence,  traditionally  investigated  during  early  developmental  stages,  has  been  noted  in  a  wide  variety  of  malignant  processes,  albeit  at  a  single  gene  level  in  the  context  of  individual  cancer  types.  Given  that  the  HOX  genes  represent  a  complex  and  interrelated  network,  a  unified  model  evaluating  the  role  of  the  entire  set  of  HOX  genes  in  cancer  has  not  yet  been  achieved.  Similarly,  an  overarching  model  that  considers  HOX  gene  patterns  in  multiple  cancer  types  is  absent.This  study  aims  to  discover  the  pattern  of  HOX  gene  expression  in  human  adult  tissues  and  cancer,  and  to  evaluate  their  function  in  vitro.  To  systematically  investigate  the  expression  of  HOX  genes  across  a  broad  spectrum  of  human  adult  tissues  and  to  assess  their  involvement  in  the  cancer  biology,  we  sought  to  map  the  landscape  of  HOX  gene  expression,  exploring  how  these  developmental  genes  are  repurposed.  Performing  computational  analyses  of  gene  expression  data  from  the  GTEx  and  TCGA  datasets,  along  with  targeted  CRISPR-Cas9  and  CRISPR  activation  (CRISPRa)  screens,  we  sought  to  understand  the  functional  implications  of  HOX  gene  expression.Our  study  unveiled  distinctive  HOX  gene  expression  patterns  across  human  adult  tissues,  confirming  their  continued  role  beyond  embryonic  development.  Notably,  a  pattern  emerged  showing  many  cancers  exhibiting  a  shift  towards  HOX  expression profiles  characteristic  of  normal  posterior  body  tissues,  a  phenomenon  we  refer  to  as  posteriorization.  We  found  posteriorization  to  be  associated  with  higher  tumor  grade  and  worse  survival  outcomes  across  a  spectrum  of  cancer  types.Experimentally,  the  functional  significance  of  HOX  genes  in  cancer  was  further  explored  using  CRISPR-Cas9  loss-of-function  (LOF)  and  CRISPRa  gain-of-function  (GOF)  screens.  These  screens  targeted  specific  HOX  genes  to  assess  their  impact  on  cell  viability  in  several  cancer  cell  lines.  The  LOF  screen  demonstrated  cell-line-specific  responses  to  HOX  paralog  group  disruption,  providing  evidence  of  both  suppressive  and  advantageous  effects  on  cancer  cell  viability.  Additionally,  the  GOF  screen  provided  insights  into  how  overexpression  of  certain  HOX  genes  can  suppress  cancer  cell  growth,  depending  on  the  cellular  context.  These  findings  show  that  the  roles  of  HOX  genes  in  cancer  is  context-dependent  and  can  vary  between  different  tumor  types.Our  investigation  focuses  on  the  expression  patterns  of  HOX  genes  in  adult  human  tissues  and  their  reprogramming  in  cancer.  The  discovery  of  posteriorization  across  various  solid  tumors  demonstrates  the  impact  of  developmental  gene  expression  patterns  on  cancer  biology.  Furthermore,  our  experimental  findings  highlight  the  importance  of  context  in  the  regulation  and  effects  of  HOX  genes  in  malignancy.  By  advancing  our  understanding  of  cancer  through  the  lens  of  developmental  biology,  our  work  paves  the  way  for  potentially  novel  approaches  to  cancer  diagnosis  and  treatment  that  exploit  the  dysregulation  of  HOX  genes.
■590    ▼aSchool  code:  0265.
■650  4▼aGenetics
■650  4▼aMedicine
■650  4▼aCellular  biology
■650  4▼aOncology
■650  4▼aDevelopmental  biology
■653    ▼aCancer
■653    ▼aHOX  genes
■653    ▼aGene  expression
■653    ▼aHuman  adult  tissues
■653    ▼aPosteriorization
■690    ▼a0369
■690    ▼a0564
■690    ▼a0379
■690    ▼a0992
■690    ▼a0758
■71020▼aYale  University▼bInvestigative  Medicine.
■7730  ▼tDissertations  Abstracts  International▼g86-02B.
■790    ▼a0265
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160532▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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